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CLASS EMPOWERMENT OF PREGNANT WOMEN ABOUT COUNTERPRESSURE EDUCATION AND BIRTH BALL FOR PAIN OF LABOR: CLASS EMPOWERMENT OF PREGNANT WOMEN ABOUT COUNTERPRESSURE EDUCATION AND BIRTH BALL FOR PAIN OF LABOR. JPK 2022, 2 (2), 145-147. https://doi.org/10.35451/jpk.v2i2.1313.